Discovery Health's medical experts answer common questions about diet and fitness:
Q: I've been repeatedly told to "get more exercise," but what does this mean?
Q: I've heard the term BMI used for describing how fat a person is. What is it?
Q: I have recently started lifting weights and some of the people at my gym use creatine. Does it work and is it safe?
Q: What can I do to tone my thighs?
Q: What is the difference between "refined" and "unrefined" carbohydrates and is it that significant?
Q: How often should I work out?
Q: How any grams of protein should a person consume daily? If you have lost muscle over a long period of time because of yo-yo dieting, should you consume more for a short period until you have regained your muscle tone?
Q: Can the ab machines sold on TV really get rid of "love handles"?